Yonke imikhiqizo Community Forum

• • Background:**

I'm a senior software engineer running Firefox Developer Edition on a Linux machine with 8GB RAM. I have Fission architecture (site isolation) enabled, which I understand is now the default since Firefox 95+.

• • The problem:**

When I open 20 or more tabs across different domains, Firefox's memory consumption scales dramatically — often reaching 4–6GB of RAM for what should be lightweight browsing sessions. This is significantly higher than what I observed before Fission was enabled.

• • What I've already tried:**

- Disabled hardware acceleration → no significant improvement - Set browser.tabs.unloadOnLowMemory to true → partial relief

 but tabs reload constantly, disrupting workflow

- Reduced content.notify.interval → marginal improvement - Tested with all extensions disabled (safe mode) → RAM usage

 still high, confirming it's not extension-related

- Checked about:memory → large number of separate

 "Web Content" processes, one per origin as expected with Fission

• • What I'm trying to understand:**

1. Is there a way to set a maximum process count cap for Fission

  without fully disabling site isolation? I found 
  dom.ipc.processCount but changing it doesn't seem to affect 
  Fission's per-origin process spawning behavior.

2. Is browser.tabs.min-warm-process-count a relevant setting here

  and what is the safe range to modify it?

3. Does Firefox have a built-in memory pressure threshold where

  it automatically consolidates processes — similar to Chrome's 
  memory saver — and if so, which about:config keys control it?

• • Environment:**

- Firefox Developer Edition 151.0b10 - OS: Ubuntu 24.04 LTS - RAM: 8GB - Fission enabled: confirmed via about:support - Extensions: disabled for testing

On last Firefox update my Password manager was blanked out. I had no username/passwords in my Password Manager although I had previously had over 100. I managed to recover it by logging in to my Mozilla account but now have access to over 7000 of other peoples usernames and passwords on my password manager. You seem to have a major data breech or is this a quirk I don't understand? These other names/passwords show up when I try to log into certain sites, such as Schwab for example, and I have to pick mine out of a host of others to fill in the login info. What is going on?

Gentlemen, isn't your browser using a lot of RAM? I've been freaking out about it in recent years. That's only with 25 tabs open!! Despite the fact that the system was installed just a day ago, without any tweaks!!!

seems that after Firefox 150.0.3 (20260511200624). I cant access locally deployed servers that are not secure. the Firefox forces https when hitting http://localhost. I've tried to disable the HTTPS setting altogether. Even in developer mode it still overwrites http to https.

i had ask the servicefrom ugreen nas why they didnt provide a firefox app in nas store , they said which i am using a global version ，not a local version of nas , and firefox limited provide to china local user , is that real ?

Hi folks, my primary password suddenly stopped working when trying to look at saved passwords today. I've changed it to a new one, needing to type in the old password to do so. That worked, which verifies I had the correct password to begin with.

I then updated the browser to the latest version. When I type in the new password on startup of Firefox it works fine to reopen all the old tabs.

However when I go to look at any of the saved website passwords, the problem reoccurs again. I type in the new password but the box shakes, refusing it.

How can it be that the primary password lets me in fine when starting up Firefox, yet I get the shaking login box when I try to look at any saved website passwords? Surely if the primary password works for one it should work for the other?

Thank you, Shane

Firefox is my browser. I use Yahoo.com for my email and news. On articles with videos attached, I get the message below (see uploaded image). It is trying to get me to accept adds in order to make full use of Yahoo.com capabilities. I do not want these adds. I thought my add blocker would prevent this. I use "Ad Remover". This just started this week. Before I was able to view any video loaded on the Yahoo cite. Any suggestions?

My desktop has the entire Proton collection of apps loaded. This includes a paid VPN. I want a VPN for my laptop as well....is it possible to load Firefox free VPN to just my laptop? Or, if the addition of free VPN is universal to all Firefox installations, is there a way to deactivate the Firefox VPN on a certain separate device? Thanks for your time!

Hello there.

Since last update i'm unable to browse websites like youtube, social media and all other websites with video content. Video often fails to load,the wholewebsite is not loading, freezes while played or while exiting full screen mode. All of these freezes the browser - the site cannot be refreshed, links does not work. The only way is to close the tab with the freezed page or kill the Firefox process in windows Task Manager. Refreshing, re-installing, deleting or using different profile don't work. Same with add-ons. Seems like the issue lies within the browser and it started to appear since last update.

Firefox is my browser but unable to access email page, "Access denied. You don't have permission to access .... on this server". Internet operating ok otherwise. Also, I have an old Windows 7 laptop which works fine - emails available and open ok.